dAGE409U20T7-PM is an external 4U-9 bay hot-swappable SATA rackmount disk array storage chassis. It provides users a most big storage capacity for up to 9 SATA drives for 1/0/5/JBOD RAID configuration. This 4U-9 Bay external SATA JBOD is designed with 2 high quality eSATA (Port Multiplier) connectors. One 120mm Ball bearing fan offer long lasting and enhanced thermal cooling solution. dAGE409U20T7-PM provides maximum storage and performance to high density storage system.